/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.dxf2.metadata.objectbundle.hooks;

import java.util.function.Consumer;
import java.util.regex.Pattern;
import lombok.AllArgsConstructor;
import org.hisp.dhis.common.IdentifiableObjectManager;
import org.hisp.dhis.document.Document;
import org.hisp.dhis.dxf2.metadata.objectbundle.ObjectBundle;
import org.hisp.dhis.feedback.ErrorCode;
import org.hisp.dhis.feedback.ErrorReport;
import org.hisp.dhis.fileresource.FileResource;
import org.hisp.dhis.fileresource.FileResourceDomain;
import org.hisp.dhis.fileresource.FileResourceService;
import org.springframework.stereotype.Component;

/**
 * @author Kristian Wærstad <kristian@dhis2.com>
 */
@Component
@AllArgsConstructor
public class DocumentObjectBundleHook extends AbstractObjectBundleHook<Document> {

  private static final Pattern URL_PATTERN =
      Pattern.compile("^https?://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]");

  private final FileResourceService fileResourceService;

  private final IdentifiableObjectManager idObjectManager;

  @Override
  public void validate(Document document, ObjectBundle bundle, Consumer<ErrorReport> addReports) {
    FileResource fileResource = fileResourceService.getFileResource(document.getUrl());

    if (document.getUrl() == null) {
      addReports.accept(new ErrorReport(Document.class, ErrorCode.E4000, "url"));
    } else if (document.isExternal() && !URL_PATTERN.matcher(document.getUrl()).matches()) {
      addReports.accept(new ErrorReport(Document.class, ErrorCode.E4004, "url", document.getUrl()));
    } else if (!document.isExternal() && fileResource == null) {
      addReports.accept(new ErrorReport(Document.class, ErrorCode.E4015, "url", document.getUrl()));
    } else if (!document.isExternal() && fileResource.isAssigned()) {
      addReports.accept(new ErrorReport(Document.class, ErrorCode.E4016, "url", document.getUrl()));
    }
  }

  @Override
  public void postCreate(Document document, ObjectBundle bundle) {
    saveDocument(document);
  }

  @Override
  public void postUpdate(Document document, ObjectBundle bundle) {
    saveDocument(document);
  }

  private void saveDocument(Document document) {
    if (!document.isExternal()) {
      FileResource fileResource = fileResourceService.getFileResource(document.getUrl());
      fileResource.setDomain(FileResourceDomain.DOCUMENT);
      fileResource.setAssigned(true);
      document.setFileResource(fileResource);
      fileResourceService.updateFileResource(fileResource);
    }

    idObjectManager.save(document);
  }
}
